STUDY GROUP 15 TELECOMMUNICATION TD 477 (PLEN/15) STANDARDIZATION SECTOR

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1 INTERNATIONAL TELECOMMUNICATION UNION STUDY GROUP 15 TELECOMMUNICATION STANDARDIZATION SECTOR STUDY PERIOD English only Original English Question(s) 10/15 Geneva, 5-16 December 2011 Source Editor G.8013/Y.1731 TEMPORARY DOCUMENT Title Draft Corrigendum 1 to Recommendation ITU-T G.8013/Y.1731 (for Consent on 16 September 2011) 1. Introduction This document contains the Draft Corrigendum 1 to Recommendation ITU-T G.8013/Y.1731 that defines Globally Unique MEG_ID for consent. Contact Yuji Tochio Fujitsu Japan Tel Fax tochio@jp.fujitsu.com Attention This is not a publication made available to the public, but an internal ITU-T Document intended only for use by the Member States of ITU, by ITU-T Sector Members and Associates, and their respective staff and collaborators in their ITU related work. It shall not be made available to, and used by, any other persons or entities without the prior written consent of ITU-T.

2 - 2 - Draft Corrigendum 1 to Recommendation ITU-T G.8013/Y.1731 (07/2011) Summary OAM functions and mechanisms for Ethernet based networks Corrigendum 1 Corrigendum 1 to Recommendation ITU-T G.8013/Y.1731 provides globally unique MEG_ID as defined in Annex A. Reference [G.8013/Y.1731] ITU-T Recommendation G.8013/Y.1731, OAM functions and mechanisms for Ethernet based networks, 07/2011 Formatted Font Italic Text correction for ITU-T G.8013/Y ) Clause 2, References Add following reference below [ISO ] ISO , Codes for the representation of names of countries and their subdivisions -- Part 1 Country codes., ) Annex A, MEG ID format Update Annex A as below Annex A MEG ID Format The features of maintenance entity group identifiers (MEG IDs) are o Each MEG ID must be globally unique o Where it may be expected that the MEG may be required for path set-up across an inter-operator boundary, the MEG ID must be available to other network operators. o The MEG ID should not change while the MEG remains in existence. o The MEG ID should be able to identify the network operator which is responsible for the MEG. The generic format of MEG IDs specific to this Recommendation is shown in Figure A-1.

3 - 3-2 MEG ID Format 3 MEG ID Length 4 5 MEG ID Value Figure A-1 Generic MEG ID format The MEG ID format type is identified by the MEG ID Format field. Specific values of MEG ID format type are defined in Table A-1 and described in sub-clauses A.1 and A.2 below. Table A-1 MEG ID Format Type MEG ID Format Type Value TLV Name 00, 5-31, Reserved (Note 1) 1-4 See below (Note 2) Types specific to this Recommendation 32 -based Format 33 and CC based Format Reserved (Note 3) Note 1 - Reserved for definition by IEEE Note 2- Use values as defined in Table of [IEEE 802.1ag] Note 3 - Reserved for future standardization by ITU-T A.1 based MEG_ID format Figure A-2 shows the format that uses the ITU Carrier Code (). is a code assigned to a network operator/service provider, maintained by the ITU-T Telecommunication Standardization Bureau (TSB) as per [ITU-T M.1400].

4 - 4-2 MEG ID Format (32) 3 MEG ID Length (13) 4 0 MEG ID Value[1] 5 0 MEG ID Value[2] 15 0 MEG ID Value[12] 16 0 MEG ID Value[13] Unused ( = all-zeroes) Figure A-2 -based MEG ID format The MEG ID Value identified by Type 32 in Figure A-2 consists of 13 characters coded according to [ITU- T.50] (International Reference Alphabet 7-bit coded character set for information exchange). Note that the MEG_ID type 32 may not be globally unique because, as described in [ITU-T M.1400], the same can exist is different countries. Therefore the MEG ID Type 32 provides uniqueness only within a country Figure A-3 shows the structure of -based MEG ID Value Figure A-3 Structure of with based MEG ID Value It consists of two subfields the ITU carrier code () followed by a unique MEG ID code (). The ITU Carrier Code consists of 1-6 left-justified characters, alphabetic (i.e., A-Z) and or numeric (i.e., 0-9).alphabetic, or leading alphabetic with trailing numeric. The code immediately follows the and shall consist of 7-12 characters, with trailing NULLs, completing the 13- character MEG ID Value. The shall be a matter for the organization to which the has been assigned, provided that uniqueness within a country is guaranteed.

5 - 5 - A.2 Global MEG ID format based on CC and Figure A-4 shows the format that uses the ITU Carrier Code () with Country Code (CC). The MEG ID Value is identified by Type 33 and consists of 15 characters coded according to [ITU- T.50]. Figure A-5 shows the MEG ID Value structure identified by CC and. It consists of three subfields the Country Code (CC), the ITU carrier code (), followed by a unique MEG ID code (). The Country Code (alpha-2) is a string of 2 alphabetic characters represented with upper case letter (i.e., A-Z). The Country Code format is defined in [ISO3166-1]. The ITU Carrier Code consists of 1-6 left-justified characters, alphabetic, (i.e., A-Z) and or numeric (i.e., 0-9). The code immediately follows the and shall consist of 7-12 characters, with trailing NULLs, completing the 15-character MEG ID Value. The shall start with the character "/" if the is less than 6 characters (as illustrated in Figure A-5) and be unique within the context of the organization to which the ITU carrier code have been assigned. 2 MEG ID Format (33) 3 MEG ID Length (15) 4 0 MEG ID Value[1] 5 0 MEG ID Value[2] 17 0 MEG ID Value[14] 18 0 MEG ID Value[15] Unused ( = all-zeroes) 47 Figure A-4 CC and based global MEG ID format CC / CC / CC / CC / CC / CC Figure A-5 Structure of CC and based global MEG ID Value